full auto blank firing gun

if one was to take an ak receiver bent from a flat, weld the trunnion to it and weld the barrel to it then weld the blank firing adapter to the end of the trunion would this convert it to a ''non gun'' enabling you to drill the forbidin third hole and make it fully automatic with no taxes or paperwork?

Some [most?] of those blank firing guns actually have the bolt in the front, so that if you put a real barrel on it and stuffed real ammo in one, the bullets would come out the stock end. The bolt cycles to the front rather than cycling to the rear.

just buy one all made. I got the one form sportsmans guide , I bet is was less money that a home build and works great,,
I brought it to a friends house and fired a bunch, you should have seen the neibors faces when I switched from semi to burst, them full auto!!! HAHAHAHAH Screw um.. HAHAHAH
hay here it is !! check it out , it is a lot of fun ASI UZI Blank Firing UZI - Automatic Blank Firing Guns - Blank-Guns-Depot.com

I am off the page for extended times due to job requirements, not gone forever

You start by drawing up diagrams of how it works and send it in to their tech branch and ask for a ruling of gun or not. They will look at it and decide. If the answer is non gun, building a prototype (preferable semi auto only at this point) and submitting it would be the way to go to CYA.